SKmoon Fire Extinguisher Holder,Roll Bar Interior kit for car roof materialnylon Holds 3Lbs,3 adjustable straps. That can adjust to any size what you want. It is easy to use holder works with 3-inch roll bars. It can hold one of 3 pound fire extinguisher Easy to install. It can use for bundled the car seat ,and it also can use for the jeep roof.